Depending on the time of year you moved, you might need to file tax documents in your old state and new state.
Don’t stress out about it. Reach out to a local CPA or Tax advisor for assistance. Keep tax supporting documents handy in a PDF format (to easily forward if needed). You can turn your phone into a portable scanner to better organize and safely store your files. Some documentation needs to be kept for a certain amount of years, such as house documents, taxes, receipts, bills etc.